新月形覆冰单导线静气动力特性的无网格数值模拟研究

Mesh-free Numerical Simulation of Static Aerodynamic Characteristics on Crescent-Shape Iced Power Transmission Line

覆冰导线在风激励下的气动力系数及其随风速攻角的变化规律是导线舞动的关键因素。论文采用基于LBM方法的无网格数值模拟软件Xflow对新月型覆冰单导线的静气动力特性进行研究,特定风速和冰厚条件下的数值模拟结果与文献风洞试验数据的高度吻合,验证了该方法的可靠性和准确性。进而开展的变风速和变冰厚条件下的导线气动力特性系数随攻角变化的规律,也与风洞试验结果呈现出一致的趋势。论文的研究表明,利用Xflow对覆冰导线气动力特性进行研究,不需要对覆冰导线周围的空气流场划分网格,提高了数值模拟的效率,为覆冰导线舞动机理的研究提供了新的、有效的途径。

Aerodynamic force coefficient soficed power transmission line under wind excitation and their change with the different angle of wind attack play a key roles for the problem of galloping of overhead transmission line.Xflow mesh-free numerical simulation software based on Lattice Boltzmann Method was used to research the static aerodynamic characteristics of crescent-shape iced power line with specific wind speed and ice thickness. The results of numerical simulation are corresponded well to the data of the wind tunnel test that the reliability and accuracy of the method is verified. Furthermore,with the change of the attack angle,the aerodynamic characteristic coefficients of the wire with variable wind speed and ice thickness are also consistent with the wind tunnel data.These results indicate that the use of Xflow is a new and effective way on the research to the galloping of iced power line its mesh-free can improve the efficiency of the numerical simulation.